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A new species of Pachypaederus Fagel, 1958, P. kongshuhensis Li, sp. nov., is described from Yunnan Province, China. This species represents the third member of the genus from the Oriental region. Color plates of the habitus, labrum, mandibles, sternites VII–IX of the male and female, as well as the aedeagal structures are provided. A key to Oriental Pachypaederus species is provided.

Two new species of the genus Pseudolathra Casey, 1905 from mainland China are reported in this paper, namely Pseudolathra gansuensis Li & Zhou, sp. nov. and P. assingi Li & Zhou, sp. nov. This genus is reported for the first time from Gansu Province, Northwest China. Both species are described in detail and supplemented with color plates of normal light photos of the habitus, sternites VII–IX and details of aedeagal structures in different views.

A new species, Queskallion saetosum sp. nov., is described herein from Sichuan Province, China. It is diagnosed from a closely related species, Q. tangi Smetana, 2015. Color images and line drawings of the adult of the new species, as well as its genitalia are provided. In addition, a checklist of species, an updated key to species and a geographical distribution map of all known species in the genus Queskallion Smetana are included.

A male of the very rare and phylogenetically puzzling species, Quelaestrygon puetzi Smetana, 1999, is described for the first time based on a single specimen from Sichuan Province, China. High quality color images and line drawings of the male external and genitalic traits are provided.

Lasiochira wuzhishanensis Yin, sp. nov. is described herein from the island province of Hainan, China. It is diagnosed from a similar species, Lasiochira jianfengensis Yin, Wang & Park, 2014. Both species are sympatric in Hainan province, but the latter is also known in northern Vietnam. Lasiochira pallidiptera Yin, Wang & Park, 2014 is recorded for the first time from China. Color images of the adults and genitalia of the above three species are provided. In addition, a checklist and a geographical distribution map of all species of Lasiochira Meyrick are included.

Two new species of Meleonoma Meyrick, 1914a (Gelechioidea, Xyloryctidae) from southeastern China are described: Meleonoma foliiformis Yin, sp. nov. from Guangxi Province and M. projecta Yin, sp. nov. from Fujian Province. Adults and male genitalia are described in detail. A list of the Meleonoma species occurring in China is given. The taxonomic position of Meleonoma has been unstable, and under debate. Nonetheless, it is here tentatively placed in the family Xyloryctidae, following the latest molecular phylogenetic study concerning this genus.

Three new species of Meleonoma Meyrick, 1914 (Gelechioidea, Xyloryctidae) from China, Yunnan Province, Meleonoma plicata sp. nov., M. scalprata sp. nov. and M. taeniata sp. nov., are described and illustrated. A key to Meleonoma species known from China is provided.

Three new species of Meleonoma Meyrick, 1914 (Gelechioidea, Xyloryctidae) from China, Yunnan Province, Meleonoma plicata sp. nov., M. scalprata sp. nov. and M. taeniata sp. nov., are described and illustrated. A key to Meleonoma species known from China is provided. [ABSTRACT FROM AUTHOR]